security. behind the scenes,anf.b.i. teamis preparing to fly to benghazi to investigate the attack. the compound behind these walls is the major crime scene, but any evidence left inside will have been badly contaminated by the looters and the curious local people who flooded in after the attack. here's what eyewitnesses, officials and libyan commanders in charge that night have told us. sometime around 9:30 p.m., about 70 armed men attacked the consulate's main gates with guns and heavy weapons. they then stormed in, overwhelming local and american security. with all four buildings on fire, the libyan government ordered a local militia to the rescue. that militia helped to ferry 31 americans and the body of sean smith out the back gate in armored cars to a house a mile away rented by the u.s. government. shortly afterwards, it, too, came under fierce attack. what we still don't know is how, back at the compound, ambassador stevens got separated from his security detail only to be found dead or dying just after midnight by the crowd. suspicion for the attack is focused on a powerfu